1. Add a Channel Mixer layer, and check the "Monochrome" box. Then enter +100, 0, 0, 0 in the four fields. This will make the whole photo black-and-white.
2. Add a Levels layer and clip it to the Channel Mixer layer. Enter these values:
Red channel: 0/1.10/255 and 0/255
Green channel: 0/1.00/255 and 0/210
Blue channel: 0/0.85/255 and 0/205
This will make the whole photo kinda skin-coloured.
3. Return to the Channel Mixer layer and invert the mask. Then paint onto the glare area.